OCR Text |
Show 1870.] REV. O. P. CAMBRIDGE ON THE GENUS IDIOPS. 153 oval form, truncate before, and depressed above ; the hinder portion of the caput is very slightly raised, and the normal furrows and indentations are strongly marked; the furrow denoting the junction of the caput and thoracic segment is very deeply indented, and of a curved form, the curve directed backwards : the surface of the cephalothorax is finely, profusely, and almost wholly covered with minute tubercular granulations ; it is otherwise destitute of clothing or armature. The eyes are normal in number and position: they are placed on two slightly raised or tubercular elevations ; one, immediately above the falces, is occupied by the two foremost eyes, the other (and larger one), at some distance behind the former, is occupied by the remaining six eyes : the two foremost eyes are about an eye's diameter above the lower margin of the clypeus; they are the largest of the eight, and are very near together (less than half an eye's diameter), but considerably removed from the two behind them, which form the second row ; these are further apart than those of the foremost (or first) row, the four forming a narrow oblong figure, rather wider behind than before : the hindermost (or third) row is composed of four eyes, in a strongly curved transverse line, the curve directed backwards ; the two central eyes of this row are the smallest of the eight, and are further apart from each other than each is from the lateral eye on its side. Falces moderate in length and strength, prominent, and curved in profile ; they are furnished towards their extremities, on the upperside, with bristly hairs, and a group of short, strong, black spines. Legs strong, moderate in length, which is relatively 4, 1, 2, 3, 1 and 4 not differing much ; they are sparingly furnished with hairs and bristles -, and a few small black spines occupy the undersides of tibia?, tarsi, and metatarsi; the tibiae of the first pair are inordinately strong, enlarging gradually to their fore extremity, near which, on the inner side, is a strongish corneous enlargement; close in front of and beyond this is another of a similar but stronger and more marked character, and of an abruptly bent form : each tarsus ends with three curved claws ; the two superior ones much the strongest, and pectinated at their base, the inferior one small and apparently destitute of pectinations. Palpi strong, rather long, and furnished with bristly hairs ; the radial is much longer than the cubital joint, and very tumid in its form, its hinder portion being almost globular. This joint has a prominence near the middle of its outer side armed with a row of short, strong, tooth-like black spines ; the digital joint is short, and has a blunt-pointed prominence at its outer extremity, and some strong spines at its extremity on the upperside ; the palpal organs are strong and prominent, consisting of a corneous lobe, elongated into a strong, bent (but not twisted) corneous apophysis, which diminishes in size to its extremity, where it is bifid, the lower limb of the bifid portion being much the longest, and curved, the upper one very slight, but-both sharp-pointed. |